• synonyms


[fey-uh-lahyt, fahy-ah-lahyt]
noun Mineralogy.
  1. the iron end member of the olivine group, Fe2SiO4.
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Origin of fayalite

1835–45; named after Fayal; see -ite1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for fayalite


  1. a rare brown or black mineral of the olivine group, consisting of iron silicate. Formula: Fe 2 SiO 4
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Word Origin

C19: named after Fayal
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

fayalite in Science


  1. See under olivine.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.